1143430221 has 8 divisors (see below), whose sum is σ = 1546046784. Its totient is φ = 751550240.

The previous prime is 1143430219. The next prime is 1143430229. The reversal of 1143430221 is 1220343411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143430221 - 2¹ = 1143430219 is a prime.

It is a super-2 number, since 2×1143430221² = 2614865340592217682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143430229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2683896 + ... + 2684321.

It is an arithmetic number, because the mean of its divisors is an integer number (193255848).

Almost surely, 2^1143430221 is an apocalyptic number.

It is an amenable number.

1143430221 is a deficient number, since it is larger than the sum of its proper divisors (402616563).

1143430221 is an equidigital number, since it uses as much as digits as its factorization.

1143430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368291.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1143430221 is about 33814.6450668937. The cubic root of 1143430221 is about 1045.6906436242.

Adding to 1143430221 its reverse (1220343411), we get a palindrome (2363773632).

The spelling of 1143430221 in words is "one billion, one hundred forty-three million, four hundred thirty thousand, two hundred twenty-one".